Mesoionic rings as third-order non-linear optical materials

A study of the non-linear refractive index ( n 2) and the non-linear absorption coefficient ( α 2) of molecules containing mesoionic rings in solution has been carried out using the Z-scan technique with 70 ps at 532 nm. The second molecular hyperpolarizabilities, γ, were inferred and the experiment...

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Bibliographic Details
Published in:Chemical physics letters 1999-08, Vol.309 (5), p.421-426
Main Authors: Bezerra, A.G, Gomes, A.S.L, Athayde-Filho, P.F, da Rocha, G.B, Miller, J, Simas, A.M
Format: Article
Language:English
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Summary:A study of the non-linear refractive index ( n 2) and the non-linear absorption coefficient ( α 2) of molecules containing mesoionic rings in solution has been carried out using the Z-scan technique with 70 ps at 532 nm. The second molecular hyperpolarizabilities, γ, were inferred and the experimental results are in a good qualitative agreement with our semi-empirical AM1–TDHF calculations. Optical Kerr gate measurements with 60 fs pulses at 800 nm allowed us to identify an ultra-fast response time for the third-order non-linearity. These results indicate that mesoionic rings are promising materials for photonic applications.
ISSN:0009-2614
1873-4448
DOI:10.1016/S0009-2614(99)00723-X